<template>
  <div style="display: flex;">
    <!-- 左侧菜单栏   -->
    <div :style="{width:(isCollapse ? '64px' : '208px')}">
      <el-menu
          style="width:100%;height:100vh;"
          background-color="#555"
          text-color="#fff"
          active-text-color="#ff0"
          router
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false">
        <el-row style="padding-top: 10px;">
          <el-col :span="2"></el-col>
          <el-col :span="7" style="padding-left: 7px;">
            <el-avatar src="/imgs/logoCricle.png"
                       style="width: 35px;height: 35px;"></el-avatar>
          </el-col>
          <el-col :span="isCollapse ? 0 :13 ">
            <span style="color:#fff;font-weight: bold;position:relative;top:8px;left:2px;">
              在线考试平台</span>
          </el-col>
        </el-row>
        <el-sub-menu index="1">
          <template #title>
            <el-icon style="font-size: 21px;"><House/></el-icon>
            <span>首页</span>
          </template>
          <el-menu-item index="/navigate">快捷导航</el-menu-item>

        </el-sub-menu>
        <el-sub-menu index="2">
          <template #title>
            <el-icon style="font-size: 21px;"><Collection/></el-icon>
            <span>考试管理</span>
          </template>
          <el-menu-item index="/examL">考试列表</el-menu-item>
          <el-menu-item index="/examM">考试管理</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="3">
          <template #title>
            <el-icon style="font-size: 21px;"><FolderOpened/></el-icon>
            <span>题库管理</span>
          </template>
          <el-menu-item index="/questionL">题库管理</el-menu-item>
          <el-menu-item index="/questionM">题目管理</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="4">
          <template #title>
            <el-icon style="font-size: 21px;"><Search/></el-icon>
            <span>成绩查询</span>
          </template>
          <el-menu-item index="/scoreQ">成绩查询</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="5">
          <template #title>
            <el-icon style="font-size: 21px;"><User/></el-icon>
            <span>学生管理</span>
          </template>
          <el-menu-item index="/studentM">学生管理</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="6">
          <template #title>
            <el-icon style="font-size: 21px;"><Avatar/></el-icon>
            <span>教师管理</span>
          </template>
          <el-menu-item index="/teacherM">教师管理</el-menu-item>
        </el-sub-menu>
      </el-menu>
    </div>




    <!-- 右侧主体内容   -->
    <div :style="{width:(isCollapse ? 'calc(100% - 64px)' : 'calc(100% - 208px)')}">
      <el-header style="height:10vh;background-color:#fff;padding:22px 0 0 20px;">
        <!-- 折叠图标+登录人姓名下拉菜单(退出登录) -->
        <el-row :gutter="10">
          <el-col :span="18">
            <el-icon style="font-size: 21px;" @click="changeCollapsed"><Expand/></el-icon>
          </el-col>
          <el-col :span="6" style="position: relative;">
            <el-dropdown style="position: absolute;right: 20px;" trigger="click">
              <span style="font-size: 19px;font-weight: bold;">
                {{user.username}}
                <el-icon><arrow-down /></el-icon>
              </span>
              <template #dropdown>
                <el-dropdown-menu>
                  <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
                </el-dropdown-menu>
              </template>
            </el-dropdown>
          </el-col>
        </el-row>
      </el-header>
      <!-- 右侧主体区域 -->
      <el-main style="height: 90vh;padding: 0;overflow-y:scroll;">
        <router-view/>
      </el-main>
    </div>
  </div>
</template>

<script setup>
import {onMounted, ref} from "vue";
import {useRoute, useRouter} from "vue-router";
import {Avatar, Collection, FolderOpened, House, Search} from "@element-plus/icons-vue";

//定义变量用来控制左侧菜单栏是否折叠
const isCollapse = ref(false);
//定义方法修改菜单栏的折叠状态
const changeCollapsed = () => {
  isCollapse.value = !isCollapse.value;
};

//获取当前登录的用户数据
const user = ref(getUser());
//定义退出登录的方法
const logout = ()=>{
  if(confirm('您确认要退出登录吗?')){
    //删除保存在localStorage中的登录用户数据
    localStorage.removeItem('user');
    //跳转至登录页面
    window.location.href = '/login';
    //清空当前登录用户数据
    user.value = '';
  }
}
//useRoute()是vue路由器提供的一个方法,用来获取当前组件的路由对象
const route = useRoute();
</script>
